DH Instruments MOLBOX OHMIC Instruction Sheet

Calibration cable

This cable kit has two uses related to the molbox mass flow terminal.

1) This kit can be used to connect the following DHI molbloc simulators:

P/N 401233 for 100 Ohm

P/N 401232 for 107 Ohm

P/N 401234 for 110 Ohm

P/N 401235 for 115 Ohm

to a precision resistance measurement standard for the purpose of measuring the resistance values of the

precision resistors in the molbloc simulators. This is an important part of maintaining the measurement

traceability of the molbox Ohmic Measurement System.

2) This kit can be used to connect (2) precision resistance references (decade boxes, for example) to the molbox

mass flow terminal for the purpose of calibrating the molbox Ohmic Measurement System. This is in lieu of using

molbloc simulators for the calibration of the molbox Ohmic Measurement System.

When using the cable to verify or measure the resistance values of the precision resistors within any of the DHI

molbloc simulators, connect the 15-pin DSUB connector directly to the simulator connector. There is no need to use

the included gender changer.

reference. Use the 4-wire resistance measurement mode of the reference for a proper measurement.

The bananna plugs are then used to connect to the resistance measurement

Figure 1 Cable use with DMM

Use of molbox ohmic

calibration cable

P/N 402150

Instruction Sheet

Table of Contents

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Page 1 2) This kit can be used to connect (2) precision resistance references (decade boxes, for example) to the molbox mass flow terminal for the purpose of calibrating the molbox Ohmic Measurement System. This is in lieu of using molbloc simulators for the calibration of the molbox Ohmic Measurement System.
Page 2 CABLE USE FOR MOLBOX OHMIC SYSTEM CALIBRATION When using the cable to apply a known resistance value to the molbox, the included gender changer will be required. Connect the gender changer to the molbox channel to be calibrated. Connect the cable to the gender changer. The bannana plugs are used to connect to the decade boxes as shown in Figure 2.

402150